钢筋混凝土薄壁箱梁碳纤维极限加固量的计算

基于平截面假定及变形协调原理,对碳纤维布加固钢筋混凝土薄壁箱梁提出了两种特征破坏模式,根据混凝土构件中各种材料的应力—应变关系,分析了加固梁体时碳纤维允许的最大加固量和最小加固量分别对应的梁体破坏状态,提出了极限加固量的计算公式。

Computation of ultimate carbon fiber dosage of CFRP strengthened thin-walled RC box beam

According to the plane cross-section assumption and the principle of consistent deformation,for reinforced concrete thin-walled box beams strengthened with the Carbon Fiber Reinforced Plastic(CFRP),two kinds of failure modes were discussed in this paper.With consideration of the stress-strain relationship of every kind of material in the concrete members,the failure states respectively corresponding to allowable maximum and minimum carbon fiber dosage of CFRP strengthened thin-walled RC box beam were analyzed,and the computation formula of ultimate carbon fiber dosage were suggested.